I have come across ABRecordCopyCompositeName() in these pages but, having Spotlighted it, have a hunch it's only available for the iOS platform. The AddressBook app itself, and ABPeoplePicker obviously do something similar internally, so is there an equivalent API for OS X? It's a tedious thing to retrieve title, first name, middle name, last name, suffix and work out if it's a company before building it yourself.
Unfortunately as you've surmised, ABRecordCopyCompositeName is only available on iOS as of this writing. There does not appear to be equivalent public API in OS X.